This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks (up to four weeks) and a six-day World weather outlook which can be very useful for travelers.
First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.
Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Tue Nov 12 2024
Valid 12Z Tue Nov 12 2024 – 12Z Thu Nov 14 2024…An Atmospheric River will bring heavy, low elevation rain and high
elevation mountain snow to the Pacific Northwest and northern California
beginning Tuesday evening……Showers and thunderstorms will bring locally heavy rainfall and
isolated flash flooding concerns to the Lower Ohio, Tennessee, and
Mississippi Valleys Wednesday……Above average temperatures continue for much of the country, cold
fronts bring more seasonable temperatures for the Northeast and the West
today…A frontal system moving through the West bringing light to moderate lower
elevation wintry mix and higher elevation snow to the northern Rockies and
Great Basin this morning will continue eastward today, with precipitation
chances spreading into the central Rockies by Tuesday evening. At the same
time, another Pacific frontal system and accompanying Atmospheric River
will approach the West, bringing a wave of Pacific moisture and triggering
increasingly heavier lower elevation/coastal rain and higher elevation
mountain snow. The system will move inland bringing an expanding area of
lower elevation/coastal rain and high elevation mountain snow to northern
California and a wintry mix into the northern Rockies and Great Basin
through Wednesday. Favorable upslope regions along the coastal ranges and
Cascades will see locally heavy rainfall and the threat of some isolated
flooding today, expanding southward into coastal northern California on
Wednesday.Some lingering light rain/snow showers may continue through Tuesday
morning across the Interior Northeast and Maine as a low pressure system
departs the region. Some heavier showers and thunderstorms are also
expected along the central Gulf Coast as moist flow from the Gulf
continues along a wavy frontal boundary. More widespread precipitation
chances will begin to pick up Tuesday evening as the first frontal system
over the West begins to move eastward out over the Plains. Initially
isolated showers and thunderstorms will increase in coverage overnight as
the system moves eastward towards the Mississippi Valley and Gulf moisture
return intensifies into Wednesday morning. More widespread storms with
locally heavy rainfall are expected across the Lower Ohio/Tennessee
Valleys, Mid-South, and into the Lower Mississippi Valley Wednesday, with
some isolated flash flooding possible especially given wet antecedent
conditions from recent rainfalls. More light to moderate rainfall is
likely over the Great Lakes with lower instability and available moisture.
The system will push eastward towards the Appalachians by Thursday
morning.Much of the central and eastern U.S. will continue to see above average
high temperatures of 5-15 degrees over the next couple of days. Forecast
highs range from the 40s in the Great Lakes, 50s in the northern Plains,
60s for the central Plains, 70s for Texas and the Southeast, and 80s along
the Gulf Coast. Highs will be more seasonable for the Northeast and
Midwest Tuesday following a cold front passage as highs mainly remain in
the 40s and 50s. Cooler, more seasonable temperatures will also come to
the Carolinas and Southeast Wednesday, with highs dropping into the upper
50s to mid-60s. The multiple frontal systems will keep temperatures cooler
across most of the West as well, with highs Tuesday mostly in the 40s and
50s for the Pacific Northwest and interior locations, 60s for coastal
California, and 60s and 70s for the Desert Southwest. Conditions will
moderate by around 5-10 degrees on Wednesday.
To get your local forecast plus active alerts and warnings click HERE and enter your city, state or zip code.
Learn about wave patterns HERE.
Then, looking at the world and of course, the U.S. shows here also. Today we are looking at precipitation.
Please click on “Read More” below to access the full Daily Report issued today.
| Notices: What would you like to learn about? Please provide that to me via the comment section at the end of the article. |
Now more detail on the 48-Hour Forecast (It is a 48 to 72 Hour Forecast actually)
Daily weather maps. The Day 1 map updates twice a day and the Day 2 and 3 maps update only once a day. These maps update automatically. But if that does not happen, you can get updates by clicking HERE
TODAY (or late in the day the evening/overnight map will appear) (Key to surface fronts shown on maps and you will then also be able to insert a city name or zip code and get a local NWS forecast).
TOMORROW
NEXT DAY
We have a new animation of the forecast which shows how things may play out over the next 60 hours. To update click ANIMATION. Doing so will get you to the dashboard. You can then step through the animation or hit LOOP on the upper right of the display. You will have to hit the back arrow ← at the top left on your computer to get back into this article. It is a little more trouble than before but I think NOAA scrapped the animation routine I was using so we have to keep up with “progress”.
The NWS Climate Prediction Center’s: Watches, Warnings, and Advisories plus other information can be found HERE. That takes you to the NWC Severe Weather Site. From there you can select among many categories of information. Remember to hit the back arrow ← at the top left of your screen to return to this article.
ATMOSPHERIC RIVERS
This tells us what is approaching the West Coast. Click HERE to update If I have not gotten around to doing the update. Here is some useful information about Atmospheric Rivers.
Below is the current five-day cumulative forecast of precipitation (Updates can be found HERE)
Ski SnowReports will Resume in the Fall.
Now we look at Intermediate-Term “Outlook” maps for three time periods. Days 6 – 10, Days 8 – 14, and Weeks 3 and 4. An outlook differs from a forecast based on how NOAA uses these terms in that an “outlook” presents information as deviation from normal and the likelihood of these deviations.
Below are the links to obtain updates and additional information. They are particularly useful if you happen to be reading this article significantly later than when it was published. I always try to provide readers with the source of the information in my articles. These links may also be useful for those viewing this article on a cell phone or other small screen.
| Days 6 – 10 (shown in Row 1) | Days 8 – 14 (Shown in Row 2) | Weeks 3 and 4 (Shown in Row 3 but updates only on Fridays) |
| https://www.cpc.ncep.noaa. gov/products/predictions/610day/ | https://www.cpc.ncep .noaa.gov/products/predictions/814day/ | https://www.cpc.ncep.noaa.gov/products/predictions/WK34/ |
Showing the actual maps. They should now update automatically. The Week 3 – 4 Outlook only updates on Fridays. So below is what I call the Intermediate-term outlook. On Fridays, it extends out 28 Days. That declines day by day so on Thursday it only looks out 22 days until the next day when the Week 3 – 4 Outlook is updated and this extends the outlook by one additional week.
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HAZARDS OUTLOOKS
Click here for the latest complete Day 3 -7 Hazards forecast which updates only on weekdays. Once a week probably Monday or Tuesday I will update the images. I provided the link for readers to get daily updates on weekdays. Use your own judgment to decide if you need to update these images. I update almost all the images Friday Night for the weekend edition of this Weather Report. So normally readers do not need to update these images but if the weather is changing quickly you may want to.
Temperature month to date can be found at https://hprcc.unl.edu/products/maps/acis/MonthTDeptUS.png
Precipitation month to date can be found at https://hprcc.unl.edu/products/maps/acis /MonthPNormUS.png
World Forecast [that website is has been intermittent so be patient]
Below are the Day 1 -3 and 4-6 forecasts for temperature and precipitation. Updates and much additional information can be obtained HERE
World Temperature Anomalies
World Accumulated Precipitation
This information is provided by the University of Maine. They draw upon many different sources. There is a lot of information available at the link provided. I have just provided two useful forecasts. There are probably over a hundred different forecasts available from this source.
Worldwide Tropical Forecast (This is a NOAA Product)
This graphic updates on Tuesdays) If it has not been updated, you can get the update by clicking here Readers will only have to do that if they are reading this article much later than the date of it being published.
Information on Tropical Storms can be found HERE. Western Pacific information can be found HERE. Note that unless there is an out-of-season storm the below images will not update until the National Hurricane Center starts their seasonal update of these maps on June 1. I include them simply because there can be an out-of-season event in which case it should show up in these maps.
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| I hope you found this article interesting and useful. |
